Large Body Portable Hydraulic Test Stand

The Large Body Portable Hydraulic Test Stand, manufactured by Hydraulics International, Inc. (HII), is a robust, mobile hydraulic system specifically engineered for servicing, testing, and troubleshooting large-body aircraft hydraulic systems. This portable hydraulic test unit provides reliable high-pressure hydraulic power, ensuring safe, effective, and efficient ground maintenance operations for commercial airliners, cargo aircraft, and military aircraft.

Designed for optimal portability, the test stand features a rugged chassis equipped with heavy-duty wheels and an ergonomically designed towing handle, allowing operators to easily maneuver and position the unit at various maintenance locations within hangars and on flight lines. Its compact yet resilient construction ensures it can withstand harsh operational environments, providing long-lasting reliability under frequent use conditions.

Technical specifications of this equipment include its ability to deliver high-pressure hydraulic fluid, commonly up to 3,000 PSI (with some models reaching pressures up to 5,000 PSI or higher), at substantial flow rates tailored for large aircraft maintenance demands (typically ranging from 20 to 50 gallons per minute). These performance capabilities allow for thorough functional testing, including flushing and priming hydraulic lines and actuators, simulating operational conditions, and verifying hydraulic system integrity.

Integral to its design is a stainless-steel hydraulic fluid reservoir of large capacity (typically between 100 to 200 liters), ensuring ample fluid availability for sustained operations. The reservoir features sight-level indicators, inspection ports, and convenient fluid drainage and refilling facilities to simplify routine servicing.

The hydraulic system employs advanced filtration, often incorporating dual-stage filtration (high-pressure and low-pressure filters), to maintain fluid cleanliness compliant with aerospace industry standards. This ensures contaminants, particulates, and moisture are efficiently removed from the fluid, protecting hydraulic components from premature wear and extending their operational lifespan.

Control and instrumentation panels are intuitive, featuring precision pressure gauges, digital flow meters, temperature indicators, and contamination monitoring systems. These diagnostic instruments provide critical real-time feedback on system performance, enabling operators to rapidly detect irregularities, facilitate prompt corrective action, and ensure compliance with aircraft maintenance specifications.

The stand is also adaptable, compatible with multiple hydraulic fluid types such as MIL-H-83282, MIL-H-5606, Skydrol, and other aviation-standard fluids. Its versatility accommodates the varied hydraulic systems present in different aircraft models.

Safety features embedded within the system include automatic pressure relief valves, emergency shutdown capabilities, and clear warning indicators, ensuring safe operational conditions for personnel and equipment alike.

Applications of this hydraulic test stand are extensive, encompassing scheduled preventive maintenance, hydraulic system troubleshooting, system flushing, and component-level certification testing. It serves airlines, aircraft maintenance facilities, MRO centers, and military aviation units seeking reliable, portable hydraulic servicing solutions.

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